Abstract
Disordered and ordered forms of nano-Li[Ni0.5Mn1.5]O-4 spinel, have been prepared by a one-pot resorcinol-formaldehyde synthesis. Lithium intercalation into disordered nano-Li[Ni0.5Mn1.5]O-4 (delta) reveals good rate capability and cycling stability. It delivers 95.5% of the capacity at a rate of 10C (1500 mA g(-1)) and 88% at 20C (3000 mA g(-1)) compared with the capacity at low rate (0.2C). A capacity retention on cycling of 99.97% per cycle at 1C rate has also been observed. The superior electrochemical behaviour of disordered nano-Li[Ni0.5Mn1.5]O4-delta has been correlated with AC impedance data, which suggest a modified surface for the nanomaetrial prepared using the resoreinol-formaldehyde route compared with micron sized materials prepared by conventional solid state synthesis.
Original language | English |
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Pages (from-to) | 5471-5475 |
Number of pages | 5 |
Journal | Dalton Transactions |
Issue number | 40 |
DOIs | |
Publication status | Published - 28 Oct 2008 |
Keywords
- RECHARGEABLE LITHIUM BATTERIES
- CATHODE MATERIALS
- 5 V
- ELECTROCHEMICAL PROPERTIES
- POSITIVE-ELECTRODE
- MACROPOROUS LI(NI1/3CO1/3MN1/3)O-2
- SECONDARY BATTERIES
- ASSISTED SYNTHESIS
- PYROLYSIS METHOD
- RATE CAPABILITY